But they can’t tell anyone what they see. In an e-mail to a
developer from Google, the company says that because the SDK is
buggy and not ready for the public, they'll have to keep what
they know on the down low:

Since these early access SDKs are not ready for the public, you
need to execute a special SDK license. This is the same SDK
license that governs the public SDK with the addition of a
confidentiality clause. We've attached the SDK license document
to this email.

As one astute commenter on the
Android Challenge Google group points out, by giving the
developers who've already won prizes an early look, Google is
just increasing the odds that these folks will win the next
challenge, which begins later this year and will dole out $5
million more to winners. It's Google's platform, and Google's
challenge. So if it wants to give some developers pole position,
so be it. But it's not going to help it win friends among the
larger developer community, some of whom have already proven to
be quite
touchy.